Hello @mgordon01 and @arekzaluski,
Thank you, it seems to be ok again, no errors and BUILD folder is back again.
But an older issue with intellisense still persist. Functions from STD library like are strst(...) or strlen(...) are marked as errors - Use of undeclared identifier 'strlen' and it does not matter what header I tried to include.
I also figure out a strange behavior with the bare metal profile now. When I create the bare metal project from Keil Studio’s templates, then it is OK. But when I create full profile, like standart Blinky, and the add mbed_app.json with bare metal configuration then an error appears - In included file: 'mbed_rtx_storage.h' file not found
BR, Jan